... quality base oils, and fully meet the requirements of Euro 4 engine, overload, wear, clean, and environmental protection ... recirculation (EGR), high-speed, heavy duty, natural absorption or turbo diesel engines, large heavy load of container transport vehicles ... sell engine oil for motorcycle, bus ,truck and heavy-duty machineary .and we also sell gear oil , ... 10W-40 15W -40 20W-50 for .EURO 4 engine